My questions are:
Basics cPanel/WHM set up
1. What should my hostname be? currently it's cpanel.ev1servers.net
2. for the primary and secondary nameservers ns1.ev1servers.net and ns2.ev1servers.net are set. however, do I need to click on "Assign Ip Address" or "Add an A entry for this nameserver"

Is there anyone that I can pay to just make sure it is 100 % correct? I called EV 1 and they stated to "put in a support ticket..."

Should I purchase a domain name and use it as a name server instead of EV1's? I will be hosting several accounts on the same server and want to make sure everyone is able to see everything properly. My direct # 818-281-2619. I am almost certain it's not that hard to do, but I am not technically apt to learn all about WHM and cPanel as well as DNS zones to make sure this is set up smoothly.

Andy is right, grab a domain so you can get your own nameservers set up. EV1 has some great starter threads on their forums, you should check it out. They have some very helpful people (not employees, users like yourself) that post there too. Having said that, you need to get your box locked down quickly. It doesn't take long before the script kiddies and crackers discover your fresh, new box is connected to the web and begin to hammer away at it. There are many companies that can help you get set up right, including Configserver.com (this forum's own Chirpy) and totalserversolutions.com (used and loved them). But before your box gets compromised I would hire someone to lock it down.